những ôxit nào sau đây là ôxit axit ? a) Al2O3,CO ,P2O5,SiO2 b) CO2,SiO2,N2O5,P2O5 c)CaO,N2O5,CO2,ZnO d) Al2O3,NO,ZnO,MgO

Choose the best answer.

I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

Choose the best answer.

We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

Choose the best answer.

I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.